/*
 * FindBugs - Find Bugs in Java programs
 * Copyright (C) 2006, University of Maryland
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307, USA
 */

package edu.umd.cs.findbugs.gui2;

import java.util.ArrayList;
import java.util.Iterator;

import edu.umd.cs.findbugs.filter.Matcher;
import edu.umd.cs.findbugs.gui2.sort.Sortable;

/**
 * These are the branches in our tree, each branch forms a complete query that could be sent 
 * to the main bugset to return all the bugs it contains
 * For example, a single bugAspects could be <priority,high> or it could be <priority,high>,
 * <designation,must fix>,<class,fishpond>,<package,default> 
 * 
 * In this implementation, <priority,high>,<designation,unclassified> is different from 
 * <designation,unclassified>,<priority,high>.  (I'm not talking about the fact we use the .equals 
 * from ArrayList, I'm talking about what a query would return, though both are true)
 * For a speed boost, this class could be rewritten to make these equal, BugSet could be rewritten 
 * to cache full queries off the main BugSet, (instead of caching each part of the query separately 
 * in the BugSets created) and resetData could be rewritten to work more like Swing's validate, only 
 * clearing data if the data is wrong.  This would save time after changing certain aspects of the tree. 
 * Just an idea, I wouldn't suggest it unless its absolutely necessary. -Dan
 * 
 * 
 * @author All of us
 */
public class BugAspects implements Iterable<BugAspects.SortableValue>
{
	private static final long serialVersionUID = -5503915081879996968L;
	private int count=-1;
	private ArrayList<BugAspects.SortableValue> lst = new ArrayList<BugAspects.SortableValue>();

	public SortableValue last() {
		return lst.get(lst.size() - 1);
	}
	public int size() {
		return lst.size();
	}
	public SortableValue get(int i) {
		return lst.get(i);
	}
	@Override
	public String toString()
	{
		if (lst.isEmpty())
			return edu.umd.cs.findbugs.L10N.getLocalString("tree.bugs", "Bugs") + " (" + count + ")";
		else	
		{
			if (count==-1)
				return last().value;
			else
				return last().key.formatValue(last().value) + " (" + count + ")";
		}
	}

	/**
	 * This is how the numbers after the branches contain the number of bugs in them, even if they aren't the final branch
	 * @param count
	 */
	public void setCount(int count)
	{
		this.count=count;
	}

	public int getCount()
	{
		return count;
	}

	public BugAspects()
	{
		super();
	}

	public BugAspects(BugAspects a)
	{
		lst = new ArrayList<SortableValue>(a.lst);
		count = a.count;
	}

	public void add(SortableValue sp) {
		lst.add(sp);
	}
	public BugAspects addToNew(SortableValue sp)
	{
		BugAspects result = new BugAspects(this);
		result.lst.add(sp);
		return result;
	}
	public Matcher getMatcher() {
		return FilterFactory.makeAndMatcher(lst);
	}
	public StackedFilterMatcher getStackedFilterMatcher(SortableFilterFactory filterFactory){
		return filterFactory.createFilterFor(lst);
	}

	public BugSet getMatchingBugs(BugSet theSet, SortableFilterFactory filterFactory)
	{        
		return theSet.getBugsMatchingFilter(this.getStackedFilterMatcher(filterFactory));
	}
	public static class SortableValue
	{
		final public Sortable key;
		final public String value;

		public SortableValue(Sortable key, String value)
		{
			this.key = key;
			this.value = value;
		}

		@Override
		public int hashCode()
		{
			return key.hashCode() + value.hashCode();
		}

		@Override
		public boolean equals(Object that)
		{
			if (!(that instanceof SortableValue))
				return false;
			SortableValue thatStringPair = ((SortableValue)that);
			return this.key.equals(thatStringPair.key) && this.value.equals(thatStringPair.value);
		}

		@Override
		public String toString()
		{
			return key +":"+ value;
		}
	}

	public Iterator<SortableValue> iterator() {
		return lst.iterator();
	}
}
